Malicious PDF — malware analysis report

Static analysis result for SHA-256 876190d26ad0746b…

MALICIOUS

PDF

72.1 KB Created: 2021-09-23 22:23:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 6de752a9e1242a277b63e63de394c751 SHA-1: a9cb4bca7932ac876059589b7c67b461be17f38d SHA-256: 876190d26ad0746b13a67647ef22d2fa74b622ed445b441f4493757749a9fa89
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, many pointing to compromised WordPress uploads or disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier further support its malicious nature. While no scripts were explicitly extracted, the PDF structure and embedded URLs indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5478

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://pixomot.ru/uplcv?utm_term=which+is+the+best+android+operating+system PDF link annotation
    • http://www.darvidproperty.com/news/file/sisitaruwon.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/6189da538a91f01539b050b7b8452955/dapabadufax.pdfIn PDF document text
    • https://taxfirma.com/userfiles/file/46329879885.pdfIn PDF document text
    • http://megamento.com/_UploadFile/Images/file/mejero.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1612f46e39d3b0---43669648808.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/murez.pdfIn PDF document text
    • https://siriusdynamics.com/assets/uploads/files/ponazep.pdfIn PDF document text
    • https://tfsroanoke.com/home/tfs/public_html/new/ckfinder/userfiles/files/44176306021.pdfIn PDF document text
    • http://sushiloverca.com/uploads/files/jezomopijubu.pdfIn PDF document text
    • http://edilgroupdigiovanni.it/userfiles/files/zexoxufejozavupotogilan.pdfIn PDF document text
    • http://augustaelectricalwork.com/editorData/file/40895769069.pdfIn PDF document text
    • https://stef-nancy.fr/upload/document/zirurenorofogilo.pdfIn PDF document text
    • http://verkaufs-akademie.com/userfiles/file/71531563490.pdfIn PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/16134d0d95cb4b---dagupuz.pdfIn PDF document text
    • https://groupunsur2.com/contents/files/vugabazowegebuk.pdfIn PDF document text
    • https://www.hotel-restaurant-plainfaing.fr/ckfinder/userfiles/files/76453750272.pdfIn PDF document text
    • https://eslms.com/userfiles/file/18973823355.pdfIn PDF document text
    • http://ahppesticide.com/userfiles/file/dasibezetejoli.pdfIn PDF document text
    • http://teifsepahan.com/files/file/miwiwiboropajapotoxi.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161398fc4e6651---budupozimuganotalupubera.pdfIn PDF document text
    • https://hinaweb.com/upload/file/kaduvedutibataniguj.pdfIn PDF document text
    • http://handsonmontessoripk.com/userfiles/files/wivogomanatejoka.pdfIn PDF document text
    • https://incoyun.com/calisma2/files/uploads/95396734624.pdfIn PDF document text
    • http://simonhoirup.dk/userfiles/file/8781975390.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d9f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9F3 18068 bytes
SHA-256: 7aee6a2fafef1eb1b8dc8130da075dba18bcbae9314555ddf8908afc76a84039
font_01_sfnt_off000108b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108B3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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